Segment Information - Summary of Assets by Geographic Region (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	$ 228,824	$ 202,695
United States [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	182,074	157,572
Malaysia [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	46,724	45,086
Other [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total Assets	$ 26	$ 37